.ding_cp {
    width: 100%;
    margin-top: 64px;
    margin-bottom: 50px;
    padding: 0 25%;
    b {
        font-size: 22px;
    }
    p:nth-child(2) {
        margin-left: 22.5%;
    }
}
*{
    margin: 0; padding: 0;
}
.ding_list {
    width: 1200px;
    display: flex;
    margin: 0 auto;
    li {
        text-align: center;
        margin-right: 54px;
    }
    li:last-child {
        margin-right: 0;
    }
    div:nth-child(1) {
        width: 260px;
        height: 260px;
        p {
            font-size: 20px;
        }
    }
    div:nth-child(2) {
        height: 120px;
        text-align: left;
        h3 {
            font-size: 20px;
            margin: 18px 0;
        }
        p {
            line-height: 24px;
            font-size: 14px;
        }
    }
    img {
        width: 30%;
        height: 30%;
        background: red;
        margin-top: 55px;
        margin-bottom: 40px;
    }
    div:nth-child(1):hover {
        background: #FF7D75;
    }
    b {
        margin: 50px 0;
    }
}

.why {
    text-align: center;
    width: 100%;
    margin-top: 144px;
}

.con {
    width: 1202px;
    height: 430px;
    margin: 0 auto;
    margin-top: 138px;
    li {
        width: 228px;
        border: 1px solid #999;
        height: 428px;
        text-align: center;
        float: left;
        margin-right: 13px;
    }
    li:last-child {
        margin-right: 0;
    }
    img {
        margin-top: 45px;
        transition: 1s;
    }
    h3 {
        margin-top: 110px;
        margin-bottom: 16px;
        font-size: 18px;
    }
    p {
        line-height: 24px;
        font-size: 14px;
        width: 168px;
        margin: 0 auto;
        height: 24px;
        overflow: hidden;
        transition: 1s;
    }
    li:hover img {
        transform: rotate(360deg);
        margin-top: -50px;
    }
    li:hover p {
        height: 120px;
    }
}

.ding_footer {
    width: 100%;
    height: 720px;
    margin-top: 80px;
    img {
        width: 100%;
        height: 100%;
    }
}